The proper way to fix these games is to mirror the ROM across the entire 32 MB addressable area of the GBA. EZ-Flash can easily add a mirror mode via FPGA (firmware) update. Alternatively fill the entire PSRAM with mirrors of the game.
There are 2 types of ROMs used in retail games. The ones that will return no data on out of bounds reads (almost all) or the 8 mbit Classic NES games which mirror the ROM because one data line is likely unconnected.
That's good info and could be considered the best way to fix it, but from my perspective as a user I don't mind whether it's done like that or by automatic patching, as long as it allows the use of unmodified ROM files on the SD card.
@EZ-Flash2 I reported this issue two months ago and you still have no clue when the update will available? Really!? I'd like to know why this is taking so long, after all the DBZ anti-piracy was addressed in this amount of time.